<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="Author" content="FengYu">
    <title>Tz-34期Js</title>
    <style>
        *{margin:0;padding:0;font-family: Microsoft YaHei,serif;}
	    li{list-style: none;}

    </style>
    <script src="https://git.oschina.net/cx-fy/personal/raw/master/conmenu.js"></script>
</head>
<body>
<script>

    var a = fn(6);

    function fn(n) {
        if(n===1){
            return 1;
        }
        return n*fn(n-1)
    }

    console.log(a)



</script>
</body>
</html>